/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.ibatis.ibator.generator.ibatis2.dao.elements;

import java.util.Set;
import java.util.TreeSet;

import org.apache.ibatis.ibator.api.FullyQualifiedTable;
import org.apache.ibatis.ibator.api.dom.java.FullyQualifiedJavaType;
import org.apache.ibatis.ibator.api.dom.java.Interface;
import org.apache.ibatis.ibator.api.dom.java.JavaVisibility;
import org.apache.ibatis.ibator.api.dom.java.JunitTestClass;
import org.apache.ibatis.ibator.api.dom.java.Method;
import org.apache.ibatis.ibator.api.dom.java.Parameter;
import org.apache.ibatis.ibator.api.dom.java.TopLevelClass;
import org.apache.ibatis.ibator.generator.ibatis2.XmlConstants;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class CountByExampleMethodGenerator extends AbstractDAOElementGenerator
{
    
    private boolean generateForJava5;
    
    public CountByExampleMethodGenerator(boolean generateForJava5)
    {
        super();
        this.generateForJava5 = generateForJava5;
    }
    
    @Override
    public void addImplementationElements(TopLevelClass topLevelClass)
    {
        Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
        Method method = getMethodShell(importedTypes);
        FullyQualifiedTable table = introspectedTable.getFullyQualifiedTable();
        
        // generate the implementation method
        StringBuilder sb = new StringBuilder();
        
        sb.append("Integer count = (Integer)  "); //$NON-NLS-1$
        sb.append(daoTemplate.getQueryForObjectMethod(table.getSqlMapNamespace(), XmlConstants.COUNT_BY_EXAMPLE_STATEMENT_ID, "example")); //$NON-NLS-1$
        method.addBodyLine(sb.toString());
        
        if (generateForJava5)
        {
            method.addBodyLine("return count;"); //$NON-NLS-1$
        }
        else
        {
            method.addBodyLine("return count.intValue();"); //$NON-NLS-1$
        }
        
        if (ibatorContext.getPlugins().daoCountByExampleMethodGenerated(method, topLevelClass, introspectedTable))
        {
            topLevelClass.addImportedTypes(importedTypes);
            topLevelClass.addMethod(method);
        }
    }
    
    @Override
    public void addInterfaceElements(Interface interfaze)
    {
        if (getExampleMethodVisibility() == JavaVisibility.PUBLIC)
        {
            Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
            Method method = getMethodShell(importedTypes);
            
            if (ibatorContext.getPlugins().daoCountByExampleMethodGenerated(method, interfaze, introspectedTable))
            {
                interfaze.addImportedTypes(importedTypes);
                interfaze.addMethod(method);
            }
        }
    }
    
    @Override
    public void addJunitElements(JunitTestClass junitClass)
    {
        // @Test
        // public void countByExample()
        Method method = new Method();
        method.addAnnotation("@Test");
        method.setVisibility(JavaVisibility.PUBLIC);
        method.setName(getDAOMethodNameCalculator().getCountByExampleMethodName(introspectedTable));
        
        method.addJunitStart();
        
        FullyQualifiedJavaType type = introspectedTable.getExampleType();
        String daoName = junitClass.getType().getShortName().replace("Test", "");
        String beanId = daoName.substring(0, 1).toLowerCase() + daoName.substring(1);
        StringBuilder sb = new StringBuilder();
        sb.append(type.getShortName()).append(" example = new ").append(type.getShortName()).append("();");
        method.addBodyLine(sb.toString());
        sb.setLength(0);
        sb.append("list = ").append(beanId).append(".selectByExample(example);");
        method.addBodyLine(sb.toString());
        sb.setLength(0);
        sb.append("count = ").append(beanId).append(".countByExample(example);");
        method.addBodyLine(sb.toString());
        method.addBodyLine("Assert.assertEquals(list.size(), count);");
        method.addBodyLine("result = true;");
        
        method.addJunitEnd();
        junitClass.addMethod(method);
    }
    
    private Method getMethodShell(Set<FullyQualifiedJavaType> importedTypes)
    {
        FullyQualifiedTable table = introspectedTable.getFullyQualifiedTable();
        FullyQualifiedJavaType type = introspectedTable.getExampleType();
        importedTypes.add(type);
        
        Method method = new Method();
        method.setVisibility(getExampleMethodVisibility());
        method.setReturnType(FullyQualifiedJavaType.getIntInstance());
        method.setName(getDAOMethodNameCalculator().getCountByExampleMethodName(introspectedTable));
        method.addParameter(new Parameter(type, "example")); //$NON-NLS-1$
        
        for (FullyQualifiedJavaType fqjt : daoTemplate.getCheckedExceptions())
        {
            method.addException(fqjt);
            importedTypes.add(fqjt);
        }
        
        ibatorContext.getCommentGenerator().addGeneralMethodComment(method, table);
        
        return method;
    }
}
